Dreaming of a week in paradise, Skylar and her friends book a stay at a beachside resort. But Skylar's not having fun in the sun. From the hotel balcony, she sees strange lights in the night sky, and when the girls hit the water, she glimpses a hideous figure beneath the surface, staring up at their dangling feet. As the boundaries between reality and myth grow murkier, Skylar is lured away from her friends and toward the moon-drenched...